SUBSTITUTED PYRIDINES - SYNTHESIS OF Α-SUBSTITUTED 5-METHYL-4-PHENYLPYRIDINES AND 3, 7-DIMETHYL-2-AZAFLUORENE ArticleProstakov N.S., Matthew C.J., Sedykh E.N.Chemistry of Heterocyclic Compounds. Том 3. 1970. С. 835-836